CN1842996A - Data segregation and fragmentation in a wireless network for improving video performance - Google Patents
Data segregation and fragmentation in a wireless network for improving video performance Download PDFInfo
- Publication number
- CN1842996A CN1842996A CNA2004800244068A CN200480024406A CN1842996A CN 1842996 A CN1842996 A CN 1842996A CN A2004800244068 A CNA2004800244068 A CN A2004800244068A CN 200480024406 A CN200480024406 A CN 200480024406A CN 1842996 A CN1842996 A CN 1842996A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0098—Unequal error protection
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Communication Control (AREA)
- Small-Scale Networks (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
A wireless communication device comprises an input terminal configured to communicate data with a processor. A segregation circuit (150) is coupled to the input terminal and configured to identify predetermined data and to separate more important data from less important data. A memory (112) is configured to store at least one parameter relevant to the wireless communication protocol. A modem (110) is coupled to segregation circuit and the memory (112) and is configured to communicate using a wireless protocol over a wireless channel, and includes a framer (152) configured to fragment the segregated data based at least in part on the at least one parameter stored in the memory. In one aspect of the invention, the wireless protocol is 802.11. Advantages of the invention include the ability to achieve high quality video communication over a wireless communication link with less chance of dropping important data.
Description
Technical field
The present invention relates to the communication in the wireless network.Particularly, the present invention relates in wireless network, be used to improve the data separating and the segmentation of video communications capability.
Background technology
It is all the fashion that radio communication is just becoming, because it allows the user freely to move and needn't be bound by a desk or electric wire.Yet the user constantly needs their wireless device to have more property and better communicate by letter.Therefore, the technology of the performance of improvement wireless device is very useful and can has very big commercial value.Can improved one side must make route message by segmentation so that they can be by communication between device effectively.
Wireless communication standard such as 802.11 WLAN (WLAN) standard in, the technology that is called segmentation is divided into less segmentation with big message so that they can transmit effectively between device.Usually, section length is fixed, yet segmentation is long more, and they are just easy more destroyed in communication.On the other hand, section length is more little, means that overhead is big more, and many more transmission and affirmation (ACK) circulation will reduce system's throughput.If therefore channel condition is fine, long section length will increase system's throughput.Be known in the art the technology that some are used for manual amendment's fragment size or are used to on-the-fly modify fragment size, but they do not take into full account some channel parameter that helps the optimization section length and variable.
In 802.11 standards, Fig. 1 illustrates media interviews control (MAC) service data units (MSDU) is divided into less MAC level frame, the standard segment processing of Medium Access Control (MAC) Protocol Data Unit (MPDU).Limited in the characteristic of channel under the situation of reception reliability of longer frame, by increasing the possibility that successfully transmits MSDU or MMPDU, segmentation is set up less than the MPDU of original MSDU length so that increase reliability.
As mentioned above, no matter traditional fragmentation technique applies identical fragmentation threshold for all packets and their importance.Needed is to be used for the technology of recognition data so that the bigger packet of importance can separate with the less packet of importance.The present invention relates to a kind of technology that is used to separate such data, especially under the condition of 802.11 wlan standards.
Summary of the invention
The invention solves the problem of being mentioned and a kind of radio communication device with split circuit is provided, especially be applied to the substandard video data of 802.11 WLAN (WLAN).This separates video communication and the reception that allows radio communication device to obtain the quality increase on radio communication channel.
Radio communication device comprises an input that is configured to processor communication data.Split circuit is coupled to input and is configured to discern predetermined data and separates bigger data and the less data of importance of importance.A memory is configured to store at least one parameter relevant with wireless communication protocol.Modulator-demodulator is coupled to split circuit and memory and is configured to use a wireless protocols to communicate by wireless channel, and comprises that one is configured at least in part to come the framer of the data that segmentation separated based on being stored at least one parameter in the memory.In one aspect of the invention, wireless protocols is 802.11.Advantage of the present invention comprises following ability: promptly, can obtain high-quality video communication on wireless communication link, the possibility of losing significant data simultaneously can be littler.
In one aspect of the invention, memory is configured to the memory segment threshold parameter, and it is set to larger than split circuit is the parameter that the bigger data of importance are distributed.Framer is configured to the data of coming segmentation to separate based on this fragmentation threshold parameter at least in part.
In one aspect of the invention, tentation data is a video data, and the bigger data of importance are that video control data and the less data of importance are video payload datas.In one aspect of the invention, video data is the video data of MPEG-2 form.
Advantage of the present invention comprises following ability: promptly can obtain high-quality video communication on wireless communication link, the possibility of losing significant data simultaneously can be littler.
Description of drawings
With reference to following accompanying drawing the present invention is described, wherein:
Fig. 1 is the schematic diagram that is illustrated in the segmentation under the 802.11 communication protocol normality conditions;
Fig. 2 is the simplified block diagram that illustrates according to two wireless devices of embodiment of the invention usage example 802.11 communication protocols;
Fig. 3 is the exemplary radio frame according to 802.11 standards;
Fig. 4 is the schematic diagram that illustrates according to the built-in function block diagram of the modulator-demodulator of the embodiment of the invention;
Fig. 5 is the schematic diagram that the packet that is used for Video Applications of the present invention aspect is shown; And
Fig. 6 is the flow chart that illustrates according to the operating procedure of the present invention of the embodiment of the invention.
Embodiment
Describe the present invention with reference to a plurality of embodiment, it can comprise concrete enforcement.The invention is intended to describe best mode of the present invention, but other similar techniques and technology also can be used to carry out the present invention.For example, with reference to 802.11 WLAN (WLAN) agreement, but other agreement also can be implemented in the present invention.Similarly, though with reference to the split circuit that is used to separate the less data of bigger data of importance and importance, the present invention also can implement in software by processor or other device.
A. use the segmentation of wireless protocol standard (802.11)
As shown in fig. 1, media interviews control (MAC) device can segmentation and is ressembled MAC service data unit (MSDU) or the Medium Access Control (MAC) Management Protocol Data Unit (MMPDU) that is directed.In these segmentations each is known as a frame of communicating by letter between wireless device.Describe segmentation in detail in 802.11 standards, it is can be in the IEEE website on the internet
Http:// www.ieee.orgLast acquisition.Though this specification description carry out the standard technique of segmentation based on fragmentation threshold, do not have instruction or suggestion to improve the technology of certain communication performance, as described in this article by separating the less data of bigger data of importance and importance.
Fig. 2 illustrates according to two wireless devices 102 of usage example 802.11 communication protocols of the embodiment of the invention and 104 simplified block diagram.Exemplary device 102 and 104 is identical, so with reference to one of them device, for example 102.Modulator-demodulator 110 is built as to be coupled to and is used for for example memory 112 of fragmentation threshold of store communications parameters.In at least one embodiment, fragmentation threshold can be passed through modulator-demodulator, processor or other device modification, but the present invention does not need such modification.Split circuit 150 is coupling between modulator-demodulator and the data I/O end.Split circuit is carried out the function that describes below so that separate bigger data and the less data of importance of importance.Though split circuit is shown between modulator-demodulator and the data I/O end, in example embodiment of the present invention, split circuit only influences the input data, and the input data are sent to modulator-demodulator, so that be transmitted by wireless protocols.
Fig. 3 is the exemplary radio frame 200 according to 802.11 standards, and wherein this frame is represented in the aforesaid segmentation one.Modulator-demodulator 110 depends on the fragmentation threshold that is stored in the memory 112 and carries out the frame that segmentation and structure comprise frame main body, and frame main body can be the 0-2312 byte long.
B. separate and segmentation
Fig. 4 is the schematic diagram that illustrates according to the built-in function block diagram of the modulator-demodulator of the embodiment of the invention.Modulator-demodulator 110 comprises a plurality of parts, for example transmitter 160 and receiver 162.In addition, modulator-demodulator comprises framer 152.As mentioned above, typically, framer is used identical fragmentation threshold without exception for all data.The present invention also comprises split circuit 150 in modulator-demodulator 110 outsides so that separate more important data and more unessential data based on the type of data.
In example embodiment, tentation data is a video data, and MPEG-2 data in particular.Split circuit 150 is configured to discern the MPEG-2 data and separates more important control data and more unessential payload data, and is as described below.
In a preferred embodiment, be stored in fragmentation threshold parameter in the memory greater than the length of important control data.By this way, when data that framer has separated based on this fragmentation threshold parameter segmentation, significant data is not by segmentation and have bigger chance and be received machine and receive fully.In great majority were used, control data was shorter than segmentation threshold value significantly, and therefore compared with the more inessential data that those total lengths with fragmentation threshold are carried out segmentation, had higher significantly chance and was received fully.
Fig. 5 is the schematic diagram that the packet that is used for Video Applications of the present invention aspect is shown.Example MPEG-2 program stream is illustrated, and it has two functions.One is that the MPEG-2 program stream is packaged as seven layers of transformat such as RTP, RCP, IP and other requirement according to different OSI.Another function is to guarantee when being packaged as the MSDU form, and packet header only is present among the MSDU rather than coexists as in all the other bags.
C. method of operation
Fig. 6 is the flow chart according to the operating procedure of the present invention of the embodiment of the invention.In step 502, modulator-demodulator receiving video data (for example mpeg data) and it is identified as a kind of in the tentation data of will separate by split circuit.In step 504, split circuit is than significant data (for example control data) and more inessential data (for example payload data) with this data separating.In step 506, the data that framer has separated based at least one parameter (for example fragmentation threshold) framing that is stored in the memory.In step 508, modulator-demodulator uses wireless protocols to transmit these data to other device on Radio Link.
D. conclusion
Advantage of the present invention comprises the following ability that gets: promptly can obtain high-quality video communication on wireless communication link, the possibility of losing significant data simultaneously can be littler.
Disclose example embodiment and best mode, can modify and change, remained on simultaneously within the theme of the present invention and spirit that is defined by the following claims with reference to disclosed embodiment.
Claims (12)
1, a kind of radio communication device, it comprises: an input, it is configured to and processor communication data; A split circuit 150, it is coupled to this input and is configured to discern tentation data and separates than significant data and more inessential data; A memory 112, it is configured to store at least one parameter relevant with wireless communication protocol; And modulator-demodulator 110, it is coupled to split circuit and this memory and is configured to use wireless protocols to communicate by wireless channel, comprise a framer 152, this framer is configured to the data of coming segmentation to separate based at least one parameter that is stored in this memory at least in part.
2, radio communication device as claimed in claim 1, wherein: this memory 112 is set to store a fragmentation threshold parameter, and it is set to larger than the parameter of this split circuit for distributing than significant data; And this framer 152 is set to the data of coming segmentation to separate based on fragmentation threshold parameter at least in part.
3, radio communication device as claimed in claim 1, wherein: this tentation data is video data and should was that video control data and this more inessential data are video payload datas than significant data.
4, radio communication device as claimed in claim 2, wherein: this tentation data is video data and should was that video control data and this more inessential data are video payload datas than significant data.
5, radio communication device as claimed in claim 5, wherein: this video data is the video data of MPEG-2 form.
6, radio communication device as claimed in claim 6, wherein: this video data is the video data of MPEG-2 form.
7, a kind of use wireless protocols method for communicating between radio modem, it comprises step: store at least one parameter relevant with this wireless communication protocol; Discern predetermined data and separate these predetermined data so that separate than significant data and more inessential data, thus the data that foundation separates; At least in part based on these these data of having separated of at least one stored parameters framing; And with at least one other modulator-demodulator uses this wireless protocols to communicate by wireless channel.
8, method as claimed in claim 7, wherein: this storing step comprises the step of storing a fragmentation threshold parameter, it is set to larger than the parameter of this split circuit for distributing than significant data; And this framing step comprises the data of coming the described separation of segmentation at least in part based on this fragmentation threshold parameter.
9, method as claimed in claim 7, wherein: this identification step comprises the identification video data and separates this video data so that separate this more important video control data and the step of more inessential video payload data.
10, method as claimed in claim 8, wherein: this identification step comprises the identification video data and separates this video data so that separate this more important video control data and the step of more inessential video payload data.
11, method as claimed in claim 9, wherein: this video data is the video data of MPEG-2 form.
12, method as claimed in claim 10, wherein: this video data is the video data of MPEG-2 form.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49799503P | 2003-08-26 | 2003-08-26 | |
| US60/497,995 | 2003-08-26 | ||
| PCT/IB2004/051567 WO2005020510A1 (en) | 2003-08-26 | 2004-08-26 | Data segregation and fragmentation in a wireless network for improving video performance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1842996A true CN1842996A (en) | 2006-10-04 |
| CN1842996B CN1842996B (en) | 2011-05-25 |
Family
ID=34216156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800244068A Expired - Fee Related CN1842996B (en) | 2003-08-26 | 2004-08-26 | Wireless communication device and method for data segregation and fragmentation |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8364832B2 (en) |
| EP (1) | EP1661317B1 (en) |
| JP (1) | JP4616259B2 (en) |
| KR (1) | KR20060083968A (en) |
| CN (1) | CN1842996B (en) |
| AT (1) | ATE382223T1 (en) |
| DE (1) | DE602004010918T2 (en) |
| WO (1) | WO2005020510A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103392325A (en) * | 2011-01-21 | 2013-11-13 | 高通股份有限公司 | User input back channel for wireless displays |
| CN103404104A (en) * | 2011-01-21 | 2013-11-20 | 高通股份有限公司 | User input back channel for wireless displays |
| US9413803B2 (en) | 2011-01-21 | 2016-08-09 | Qualcomm Incorporated | User input back channel for wireless displays |
| US9582239B2 (en) | 2011-01-21 | 2017-02-28 | Qualcomm Incorporated | User input back channel for wireless displays |
| US9787725B2 (en) | 2011-01-21 | 2017-10-10 | Qualcomm Incorporated | User input back channel for wireless displays |
| US10135900B2 (en) | 2011-01-21 | 2018-11-20 | Qualcomm Incorporated | User input back channel for wireless displays |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7768988B2 (en) * | 2005-02-22 | 2010-08-03 | Intel Corporation | Method and apparatus to perform network medium reservation in a wireless network |
| US20060215626A1 (en) * | 2005-03-25 | 2006-09-28 | Intel Corporation | Apparatus to transmit OFDM symbols with aligned fragmentation threshold |
| US8605604B1 (en) * | 2009-12-23 | 2013-12-10 | Marvell International Ltd. | WLAN module test system |
| CN104505922B (en) * | 2014-12-08 | 2016-08-24 | 宁波力芯科信息科技有限公司 | A kind of wireless charger with WIFI function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE69416849T2 (en) | 1993-10-26 | 1999-07-08 | Northern Telecom Ltd., Montreal, Quebec | DIGITAL TRANSMISSION LINE FOR EFFICIENT TRANSPORTATION OF MIXED PACKAGE CLASSES |
| AU8759198A (en) | 1997-07-28 | 1999-02-16 | Roy H. Campbell | A robust, reliable compression and packetization scheme for transmitting video |
| JP3007069B2 (en) * | 1998-03-05 | 2000-02-07 | 日本電信電話株式会社 | Wireless packet transfer method |
| TW431087B (en) * | 1998-07-28 | 2001-04-21 | Sony Computer Entertainment Inc | Information transmission reception system and information transmission reception method, and information receiver used therein |
| US20020056125A1 (en) * | 1998-09-28 | 2002-05-09 | Hodge Winston W. | Multi-tier buffering system and method which combines video, data, and voice packets |
| US7103065B1 (en) * | 1998-10-30 | 2006-09-05 | Broadcom Corporation | Data packet fragmentation in a cable modem system |
| US7257641B1 (en) * | 2000-03-30 | 2007-08-14 | Microsoft Corporation | Multipoint processing unit |
| US7039038B2 (en) * | 2001-01-18 | 2006-05-02 | Texas Instruments Incorporated | Adaptive fragmentation for wireless network communications |
| WO2003017577A1 (en) * | 2001-08-09 | 2003-02-27 | Matsushita Electric Industrial Co., Ltd. | Transmission apparatus and transmission method |
-
2004
- 2004-08-26 EP EP04769854A patent/EP1661317B1/en not_active Expired - Lifetime
- 2004-08-26 DE DE602004010918T patent/DE602004010918T2/en not_active Expired - Lifetime
- 2004-08-26 KR KR1020067003829A patent/KR20060083968A/en not_active Application Discontinuation
- 2004-08-26 AT AT04769854T patent/ATE382223T1/en not_active IP Right Cessation
- 2004-08-26 CN CN2004800244068A patent/CN1842996B/en not_active Expired - Fee Related
- 2004-08-26 JP JP2006524520A patent/JP4616259B2/en not_active Expired - Fee Related
- 2004-08-26 WO PCT/IB2004/051567 patent/WO2005020510A1/en active IP Right Grant
- 2004-08-26 US US10/569,016 patent/US8364832B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103392325A (en) * | 2011-01-21 | 2013-11-13 | 高通股份有限公司 | User input back channel for wireless displays |
| CN103404104A (en) * | 2011-01-21 | 2013-11-20 | 高通股份有限公司 | User input back channel for wireless displays |
| US9413803B2 (en) | 2011-01-21 | 2016-08-09 | Qualcomm Incorporated | User input back channel for wireless displays |
| CN103404104B (en) * | 2011-01-21 | 2016-08-24 | 高通股份有限公司 | User for radio display inputs Return Channel |
| US9582239B2 (en) | 2011-01-21 | 2017-02-28 | Qualcomm Incorporated | User input back channel for wireless displays |
| CN103392325B (en) * | 2011-01-21 | 2017-05-24 | 高通股份有限公司 | User input back channel for wireless displays |
| US9787725B2 (en) | 2011-01-21 | 2017-10-10 | Qualcomm Incorporated | User input back channel for wireless displays |
| US10135900B2 (en) | 2011-01-21 | 2018-11-20 | Qualcomm Incorporated | User input back channel for wireless displays |
| US10382494B2 (en) | 2011-01-21 | 2019-08-13 | Qualcomm Incorporated | User input back channel for wireless displays |
| US10911498B2 (en) | 2011-01-21 | 2021-02-02 | Qualcomm Incorporated | User input back channel for wireless displays |
Also Published As
| Publication number | Publication date |
|---|---|
| US20070140291A1 (en) | 2007-06-21 |
| CN1842996B (en) | 2011-05-25 |
| DE602004010918D1 (en) | 2008-02-07 |
| DE602004010918T2 (en) | 2009-01-02 |
| JP4616259B2 (en) | 2011-01-19 |
| US8364832B2 (en) | 2013-01-29 |
| EP1661317A1 (en) | 2006-05-31 |
| JP2007503749A (en) | 2007-02-22 |
| ATE382223T1 (en) | 2008-01-15 |
| EP1661317B1 (en) | 2007-12-26 |
| KR20060083968A (en) | 2006-07-21 |
| WO2005020510A1 (en) | 2005-03-03 |
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Owner name: NXP CO., LTD. Free format text: FORMER OWNER: KONINKLIJKE PHILIPS ELECTRONICS N.V. Effective date: 20070810 |
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